Noel Gallagher has advised Britain's Prince William to rejoin the army once he becomes a father

The second-in-line to the throne is expecting his first child with wife Duchess Catherine and father-of-three Noel says if William wants some peace and quiet, he would be better off fighting for his country because the baby will take up a lot of the couple's time and ruin his chances of sleep.

Speaking at a press conference to announce the line-up for the 2013 Teenage Cancer Trust concerts, the former Oasis guitarist said: "They're not the first people in the country to have a child, are they? I've got three, you know. Do I have any advice for them? People write books about that sh*t. Very expensive books - my wife's got 'em all.

"Tell William he'd be better thinking about rejoining the army - he'd have a quieter life."

However, William - who works as an RAF search-and-rescue pilot - wants to be hands-on father and could even scale back on his work once the tot arrives.

A source told The Sun newspaper: "William cannot wait to be a dad. He wants to have the family stability for his heir that he never had. He will even change nappies. He's a modern man."

Duchess Catherine - who is also known as her maiden name of Kate Middleton - is currently in hospital suffering from hyperemesis gravidarum (acute morning sickness).